Exhuast manifold bolts rusted at threads

[Thumbtack]

mercruiser v-8 big block. after burning off the heads (what was left of them after the rust) i slid off the manifold but can't get the rest of the bolt out of the block because it is actually rusted where the threads are. Is it safe to use the oxy-cetaline around the surface where the bolts are?

 

[Bondo]

Re: Exhuast manifold bolts rusted at threads

Ayuh,....

Other than the fact that the valve cover gaskets,+ whatnot are extremely Close by,......
Go for it.......

Personally,......
I've had Good Luck just clamping them tight with Vise-Grips,+ turning them out.....

 

[Thumbtack]

Re: Exhuast manifold bolts rusted at threads

thanks i'll give it a shot, i'll keep the flame small. I tried the vise grips but they wouldn't budge, i know they should come out pretty easily at this point so i'll probably just need a little heat.

 

[Bondo]

Re: Exhuast manifold bolts rusted at threads

Ayuh,.....

Another little Trick,.....

With a BFH,..Wack the stud dead on, straight Inward, Oil it,+ Try turning it....

 

[Thumbtack]

Re: Exhuast manifold bolts rusted at threads

Thanks for the trick, it helped. I got em out. Is it bad to put stainless back in?

 

[Bondo]

Re: Exhuast manifold bolts rusted at threads

SSteel is Soft,......
I'd use Steel,..
And,..
I'd Neversieze'em......